Rivet holder



p 1951 D. YELLEII ETAL 2,568,676

RIVET HOLDER Filed Feb. 10, 1947 IN V EN TORS. YMOUE MOSKOW/T Z V/D YE L L EN ATTORNEY Patented Sept. 18, 1951 rAT- ENT OFFICE ,David XcIlenXand Seymour Momma, New ,Yo'rk,.N. 1.

Application February 10, 194 7, SerialNo. 728,748

(Cl..' i8.53{5) The object of this invention is-to :provide :a rivet =holder, attachable to a e :clamp; said rivet holderto be used in a minimum amount of time to-provide an-easy-and eflicien'tmeans of holding a rivet joining two pieces of :metal LSBCUTELY in place whilethe rivet is being peened-P Other objects-and advantagesor this-invention will become apparentupon furtherperusal of this specification.

Fig. 1 is an isometric View of the clamp =(riveting').

Fig. 2 is a cross-sectional viewoi'the anvil t, and of-the threaded shankz.

All of the numerals used in this specification are set forth ascharacters ef-reference-on the drawing. 7 Referring to Fig. Laportion of'theisometric view is cut away to show clearly the'hinge leaf 8, the two curved metal plates'comprising the clamp attachment H, the carriage bolt 9, and the wing-nut HI. 7

-A second portion of theisometrlc view is cut away to show'the assembly ofthe pin'5- to the female threaded-sleeve-3, in=a manner that is to'be described more fully at a later-point'in this specification.

Fig. 2 is'aview of the cross-section through the anvil -l and threaded shank 2.

In greaterdetail the hinge leaf l contains within it, symmetrically cut out about its center point asquare holein which the head of the carriage bolt *9 is-tightly fitted, and a series of radial grooves l-2 into which-keyways t3, situated at the end of the-sidewallcf the two curved metal clamp adjustment plates, are permanently secured; as shownin ail-aforementioned cut away viewof Figil.

Although, for purposes of-greaterdetail. only one keyway i3 is shown engaged in-one of the radial grooves [2 in the cut away view'of Fig. 1, referredv to in the preceding paragraph, in actual practice an equal number of keyways l3 are engaged inan equal number of-ra-dialgrooves 12. The function of the radial grooves l2 is'to provide. openings into. v.whieh;the keyways or protuberances t3" maybe permanently force-fitted; in order that the curved metal plates II, II of the clamping attachment may be aflixedpermanently to one another.

The clamp attachment ll -consist's- *of' two curved metal Plates. one of? theiplates merely being an extension of hingeleaf 8, while the secondplateis made up of threesections; namely: a ..o irvedfsection, a straight.. section containing about its center-pointa hole through which-the threaded shankof the carriage bolt 9 is allowed to :pass anda third section or sidewall, which is at' rightangles to the straight section, andfitsup snugly-against the inner wall of the hingeleaf 8; the keyways 13 of the sidewall being permanently secured in the radial groove 12 as above men tioned in the precedingparagraphs.

C clampsare used in conjunction with the sheet metal hand riveting clamp described in this specification in order that two or more pieces of sheetme'tal may 'be-secured in position by the C clamps, preparatory to passing a rivetthrough the holes in the various pieces-of sheet metal. The regulation ofthe desired pressure to be exerted by the; clamp attachment plates II upon either the ribs or the threaded shank of a C clamp w-hen afiixing or detaching the clamp attachment ll to or'from the c clamp, is accompl'i'shed by turning the wing-nut 10 on the threaded shank of thecarriage bo1t-9. The curved sections of the metal clamp attachment platesl I enables theplates to exert a firm grip on the threaded shanksand ribs of C clamps of varying dimensions.

Referring-again in detail to Fig. '1, I designates an anvil, permanently attached to a threaded shank 2; the thread of saidthreaded shank rinating in a "snugfitwith the female threads ofthe sleeve 3. A wing-nut 6 is firmly secured to the lower end of the threaded shank 2.

The outer sleeve 4 is in the form of an ellipse and'is'jcined to the hinge leaf 8" by means of the hinge T; the hinge I and the elliptically'formed sleeve 4 together constituting a single unit. Pins 5,15, passing in aclose fit through holes (only one hole appears in Fig. 1 which is in perspective, the other hole being ,diametrical opposite and hidden) provided for the purpose in the elliptically iormedsIeeve 4' is securely and immovably attached tothe sleeve .3; thereby serving as a fixed shaft tothe sleeve 3,. providing a means of supportbywhich the sleeve 3, threaded shank 2, anvilj-l' and wing-nut 6 are free to oscillate, as a single unit, toa limited degree, in either. a clockwise or a counterclockwise directionin the elliptically formed outer: sleeve 4.

QThedegree of oscillationpf the unit. comprised o f the anvil [,threaddshank 2, sleeve 3 and wingenut 6 in either. clockwise. or-counterclockwise-direction is determined by the difference be. tween the radius of. the outer; suriaceof the sleeve 333 116. the major diameter. of the inner surface ihee1 i9 0e11r te me s e ve l- Th p n;

located on the minor axis of the sleeve 4. The outer radius of the sleeve 3 is equal to the minor axis of the elliptically formed sleeve 4.

symmetrically about the center-point of the upper circular surface of the anvil I upon which the rivet head rests (see Figs. 1 and 2), is a fiat circular depressed inner surface whose sidewalls extend upwards at a slight angle in all directions to merge with the circular outer surface of the anvil I, said circular outer surface sloping downwards to meet the raised circular rim of th anvil I.

Position B of anvil I (see Fig. 2) shows the anvil I in a vertical or upright position, with the head of the rivet resting on the flat circularinner depressed surface, of the anvil I, preparatoryto the final adjustment of therivet byturining the wing-nut 6 and the threaded shank 2 in the sleeve 3, raising or lowering the rivet through the aligned holes of the various pieces of sheet metal whichit is'to join; so thatat the final adjust-,- ment of the rivet, there is a slight amount of space, equal .to the depth fromthe top surface of the anvil I, between the under surface of the piece of sheet metal in contactwith the rivet head and the upper surface of the rivet head.

If, when the rivet is in position .B, as described in the above paragraph, the anvil I, threaded shank 2, sleeve 3 and wing-nut 6 beoscillated in either a clockwise orcounterclockwi e direction in the elliptically formed sleeve 4, thehead of the rivet will; be forced into the circular surface of the anvil I and 'will ;be held tightly up against theunder surface of the piece of sheetmetal with which it is in contact; since therivet remains in a vertical position inthe aligned holes of the piecesof sheet metal through which it is passed, while the anvil I rotates beneath it, in either a clockwise or counterclockwise direction. Position A of the rivet (as shown in Fig. 2) sho ws the position of the rivet on the circular outer surface of the anvil I in comparison to position B; so that it may be clearly indicated that a definite degree of oscillation in either a clockwise or counterclockwise direction of the anvil I, threaded shank 2, wing-nut 6, sleeve 3 and pin 5 must occur for a tight securance of the rivet head between the outer surface of the anvil I and the under surface of the piece of sheet metal with which the rivet head is in contact. a

After securing the rivet in position by means of swinging in either a clockwise or counterclockwise direction, the anvil I, upon which therivet head rests, the threaded shank 2, the sleeve 3, the pin 5, and the wing-nut 6, as detailed in the preceding paragraphs of this specification; any .blows directed by a hammer onto the shank of the .rivet while peening the rivet will tend to cause the anvil I, threaded shank 2, sleeve 3 and wing- :nut is to swing still further in the original direc- 'tion of oscillation (be it either clockwise or counterclockwise) in the sleeve 4; thereby forcing the head of the rivet, which is resting on the outer surface of the anvil I, to remain tightly in position up against the under surface of the sheet metal, under the impact of all hammer blows directed onto the shank of the rivet;

Rivet B is shown in Fig. 2 in the central depression in the initial position of the device, with the head of the rivet underlying the underside of the work, the aforesaid predetermined dimension. When the inner sleeve or tube 3 is turned, as described, one or the other of the raised portions, depending upon the direction in which sleeve 3 is turned, will be brought vertical and underlying the rivet. But it will be noted, esp-- cially from Fig. 2, that the distance from the pivot axis 5 (see Fig. l) to the raised portion of the anvil is greater than the distance to the central depression. More particularly, this increase in dimension is in the order of the aforesaid distance between the head of the rivet and the underside of the work. Hence the rivet head will be brought tightly against the underside of the work as a result'of said turning of the inner sleeve 3 and its anvil I.

'-It will be further noted from Fig. 2 that an aggis normal to said raised portion intersects the vertical at a point somewhat above the aforesaid pivotal axis 5* (see Fig. 1) of the device. consequence, when force is exerted in the peening operation, upon theanvil, more accurately, upon I will be developed tending to force the anvil fur- .and,desiretosecure byLetters Patentis;

ther in the direction in which it had been initially turned, .as aforesaid; I

For purposes jof 'greater, mobility and emciency in use,'the unit comprised of the hinge I, elliptical sleeveL'femalethreaded sleeve 3, threaded sleeve 72', anvil ;I,, pin, 5 and wing-nut 6, is capable of a horizontal rotation in a wide arc about the hinge leaf. ,8; the, degree 9f rotation being lin ited only by the contact Lthe;elli tiq :s v 4 0r pi *5 with the wing-nut II] at one end of the arc of rotat man by h con act .Q he lli i a s e 4 with the hinge leaf 8 at the other end of the arc oflrq ation.

Having thus described our invention tothe best of ourahilimwat wec m as n w and u f 1. In an anvil device for use in riveting sheet meta-1m; t er work. in'pomb nati n. l tiw sleeve m ans ra c. s a 'sl ev rtp av eie of m sec em ntan nte n l fi r a memer. p v ta lymounte bn a d s e. alead Screw in said threaded member, an anvil secured at one end .of said lead screw, said anvil having a centraldepression and at least one raised portion, saidfle d sc e einst rned tobri s thehe d qf a rivet rested -1n said central depression of the anvil a predetermined distance from the -under: s dao p h the dis n om a Pi ot axis to the said raised portion being greater than he d st n e-from sai a i t th -s n r depression by the aforesaid predetermined distan e whc rwlien t e t ead d. b a its saidanvil is turned on said pivoaoneofsaid raised portions will underlie the rivet, the head of whichwillbe jammed tight against the underside o ne er-.1; a

:11 cqm.. a iona e to ai 1 e in a line normal to the said raised portion ofthe anvil willintersect the vertical through said pivotal axis ata point above said axis, whereby the force of the peening operation upon the raised a'nvil iportion when turned 111 one direction, will "exert'a turning movement tending to further turn the. said thjeaded. member and its anvil the said'direction. I 

